Lithium battery diaphragm capable of effectively improving safety performance
A lithium battery separator and safety performance technology, applied in the field of lithium battery separator materials, can solve the problems of high thermal shrinkage, low melting temperature of microporous film, and high micropore closing temperature, and achieve the effect of changing structure and crystallinity
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Embodiment 1
[0021] (1) 25g high-density polyethylene, 2g polystyrene, 100mL dimethyl ether, 1g antioxidant 1010 are added together in the reactor equipped with stirring device, heating device and nitrogen protection device, under nitrogen protection, the temperature is 170 °C and a rotation speed of 600 rpm for 2 hours to obtain a homogeneous solution;
[0022] (2) Afterwards, put the homogeneous solution prepared above into an electric heating mold, hot press at a temperature of 170° C. and a pressure of 8 MPa, and then quench in distilled water at 0° C. to obtain a film component;
[0023] (3) Use absolute ethanol to extract the liquid paraffin in the membrane component, then place it in a vacuum drying oven, vacuum dry it at a vacuum degree of 133Pa and a temperature of 60°C for 2 hours, and fix it with a clamping mold at 100°C. Heat setting for 3 minutes to prepare lithium battery separator;
[0024] (4) The performance test was carried out on the lithium battery separator prepared a...
Embodiment 2
[0026] (1) 35g high-density polyethylene, 5g polystyrene, 100mL dimethyl ether, 2g antioxidant 1010 are added together in the reactor equipped with stirring device, heating device and nitrogen protection device, under nitrogen protection, the temperature is 200 ℃, and the rotation speed was 800rpm for 3h to obtain a homogeneous solution;
[0027] (2) Afterwards, put the homogeneous solution prepared above into an electric heating mold, hot press at a temperature of 200° C. and a pressure of 12 MPa, and then quench in distilled water at 0° C. to obtain a film component;
[0028] (3) Use absolute ethanol to extract the liquid paraffin in the membrane component, then place it in a vacuum drying oven, vacuum-dry it at a vacuum degree of 133Pa and a temperature of 80°C for 3 hours, and fix it with a clamping mold at 100°C. Heat setting for 5 minutes to prepare lithium battery separator;
[0029] (4) The performance test was carried out on the lithium battery separator prepared abo...
Embodiment 3
[0031] (1) 30g high-density polyethylene, 3g polystyrene, 100mL dimethyl ether, 1.5g antioxidant 1010 are added together in the reactor equipped with stirring device, heating device and nitrogen protection device, under nitrogen protection, the temperature is React at 180°C and 700rpm for 2.5h to obtain a homogeneous solution;
[0032] (2) Afterwards, put the homogeneous solution prepared above into an electric heating mold, hot press at a temperature of 180° C. and a pressure of 10 MPa, and then quench in distilled water at 0° C. to obtain a film component;
[0033] (3) Use absolute ethanol to extract the liquid paraffin in the membrane component, then place it in a vacuum drying oven, vacuum-dry it at a vacuum degree of 133Pa and a temperature of 70°C for 2.5h, and fix it with a clamping mold at 100°C Carry out heat setting for 4 minutes to prepare lithium battery separator;
[0034] (4) The performance test was carried out on the lithium battery separator prepared above, a...
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